perl hash 根据键访问相应值

但是HASH的键则全部必须是唯一的字符窜访问hash元素[oracle@jhoa 9]$ cat 4.pl my %hash = ("a" => 1,"b" => 2,"c" => 3);$var= $hash{a};print "\$var is $var\n";[oracle@jhoa 9]$ perl 4.pl $var is 1hash 键赋值[oracle@jhoa 9]$ cat 5.pl my %hash = ("a" => 1,"b" => 2,"c" => 3);foreach $var (qw/a b c/){print "I've head of $var $hash{$var}.\n";}[oracle@jhoa 9]$ perl 5.pl I've head of a 1.I've head of b 2.I've head of c 3.